Syringe



June 2, 1

R. E. KLETT SYRINGE Filed March 12 1920 3 vwanloz a Re: n;

Patented June 2, 1925.

UNITED STATES 1,540,215 PATENT, OFF-ICE.

ROBERT E. KLETT,-F RinGEwoon rAEK, NEW JERSEY, ASSIGNOR ro KLErr MANUFAC TUBING CO'MPANY,-INC., OF N W YORK, N. Y., A CORPORATION on NEW YORK.

. sYEInGE.

Application filed March 12, 192i). Serial No. 365,177.

ternally to true cylindrical form and carrying a piston either composed of a solid glass rod ground to fit the barrel or else of glass with a metallic rod, no packings being used.

.Although numerous devices of such syringes are now on the market they are unsatisfactory for. various. reasons, among which may be mentioned the difficulty of attaching the ferrulestothe barrel, the chiliculty of closing the forward end carrying the nozzle, and also liability of the piston to'be drawn too far back and disengaged entirely from the barrel. These syringes ordinarily carry finger holds and. another difficulty is in properly attaching the finger hold to the rear end of the barrel.

By this invention a method or means is provided for attaching a ferrule to either or both ends of the barrel in such manner as to permit the forward end to be closed or the rear. end to carry a finger rest with or without a movable stop for preventing the piston from being wholly withdrawn from the barrel. As is well known, these syringes are required to be frequently sterilized in boiling water, disinfectants, etc, and must' be disassembled in order to permit free ac cess of the sterilizing medium to all parts, as well as thorough cleaning.

According to this invention, the front end of the barrel is preferably closed by a glass disc fused to the end of the barrel, and within this disc is a plug having a ground lit in the barrel, both the plug and the disc being perforated to receive the nozzle which is fastened by an external nutfor other means. For carrynig the nozzle or adding strength at this end a metallic ferrule may be provided. At the rear end, a similar ferrule is desired, whichwill carry the finger rest and also the movable latch for stopping the piston before it leaves the barrel. But 1 a particular feature ofthis invention resides in the means for attaching these ferrules to the glass or other nonmetalliocylinder. This material is frequently brittle and it is difficult to make cements fasten the metal to the glass. I accomplish this result by grooving thebarrel, springing ametallic band therein and providing a ferrule which will overlie the band and which can be either soldered to the band or spun down over the band, or cemented thereto, as may bepreferred. This is applicable to either end. The ferrule carries a pivoted arched latch which can be swung up to embrace the reduced portion of the piston rod so as to stop the piston'before it leaves the barrel,

and when the piston is to be taken up the latch is swung down out of the way. The

invention will be more fully understood in 1 represents the barrehusually composed v of glass, 2 the piston, preferably composed of glass but for some purposes may be composed of metal, but without a packing, both the barrel and the piston being ground to .3 represents the piston rod having a handle 4. At the forward end, the barrel is sealed by a disc 5 fused therein, and within the end of the barrel adjacent the disc 5' isa plug ,6 having a groundfit'in the barrel. The plug 6 and disc 5 are bored to receive a discharge nozzle 7, the inner end of whichis expanded to prevent the nozzle 7 from drawing outwardly through plug 6, while the outer end of nozzle 7 is secured by a nut or other fastening means 8 to prevent the nozzle 7 from being forced inwardly. To add strength a-ferrule 9 maybe interposed between the fastening 8 and the disc 5, and this ferrule is secured to the barrel independently of the disco by means of a band 10 shrunk in a groove adjacent the end of the barrel and the ferrule 9 secured to this band, either by solder, cement, or by spinning down. The band 10 is usually in the form of a ring made of such diameter as to slide over the barrel and contract tightly into the groove, and readily lends itself to being cemented or soldered to the "ferrule 3. The'arch .ol the loop 14 is made of such size as tostopthepistonbetore itileagves the barrel, and when it is desired to withdraw "the piston entirely the loops ap'e swung down, as shownin dotted lines in Figure-3, to permit this. 'The lugs '13 are provided with slots into which the loops spring when extended-so as to hold them. "One 'loop can be used instead of two .if desir d and the loops can readily be detached fromthe :l'ugs 13 when desired. Forthepurpose oft'asteningto the barrel, the ferrulell is equivalent to ferrule 9. V K V Figure '4 differs from Figure .1 in "that the ferrule at the front end is omitted and the nozzle 7 and n'utS :are ofsomewhat diiterent shape. p I

Various modifications and changesmay be made without departing from the scope of the appended claims.

hat I claim is: V

1. In a syringehaving -a non inetallicbarrel, agroove adjacent the end thereof, a band fitting in said groove, a ferrulefitting over said band, and means securingthe ferrule and the iband. V p

2. In a syringehaving a non-'metallic bar rel, a groove adjacent the end thereo'fla band fitting in said groove, and a -ferrule soldered to said band.

3. In a syringe having a non-metallic barrel, a groove adjacent the end thereof, a band fitting in saidgroove, and a' ferrule overlying and soldered to said band.

4. A syringe comprising a non metallic barrel, a groove adjacent theendof the barrel, an end fused 'to the barrel, a ferrule covering the end and soldered to the band, a plug having a ground fit inthe barrel, and a nozzle passing through the plug.

5. A syringe comprising a non-metallic barrel,1agrooveedjacentthe end of the bar- :rel, band seated in said groove, a 'terrulc secured to said band, a piston sliding in the barrel, and a latch carried by the ferrule and movable to av position to stop the piston before the latterdisengages from the barrel.

6. A syringe comprising a non-metallic barrel, a groove adjacentith'e' end-ott'lie l ar. rel, aband :seated'in the groove, a ierrule secured 'to said "band, a piston sliding in the batrrehand an arched latch nionnted'on the ferrule and movable "to engage and stop the piston w'hen itis about'to 'leave the barrel.

7. 'In asyringe, 'theconibination with an open ended barrel, of ,a removable piston therein, a linger' rest 'on' the end of {the barrel, a latch pivoted to said finger rest and :movable about the same to and from-a -posi- *tion preventing removal of the "piston from "the barrel and :a position permitting removal 'oi said piston. I

8. In a" syringe, the'comb'ina'tion with a non-metallic open :ended barrel provided with a "groove adjacent'its rear .end,of a pisston in said barrel, a band fitting in said groove, a finger rest secured to said band, and a latch pivotaflly secured to said linger zrest in a manner to permit or prevent-removal of :the piston from the barrel.

9; A syringe comprising a nonunetallic barrel, and end fuseditlierein, a plug having a ground fit, 'and.a mozz'le passing-through the plug-andt-he-end.

10, Asyringe comprising in COITllil'fifltl'OD a none-metallic 'barre'l, -a non-metallic disc fastened thereto, a plug fitting within :the barrel and adjacent tl1e-disc,-a nozzle extend- 'ing through the plug and through the .disc and having its inner :end --en'la:r ;ged to 'prevent its removaly'thro'ug'h :sa-id plug, and a clamping means in cooperation with said nozzle and discito'retainsaid'plug and nozzle in cooperation with said "disc.

"Signed-at New York cityi-nthe county of New York and "State of New York this 8 day of March ARD. 1920.

ROBERT n. it-133m. 

